The best
means of personal protection from radiation for emergency responders is the
implementation of three basic principles: time, distance and shielding. Please
show your work when answering the following questions: a. Using the inverse
square law of radiation, what Geiger counter reading would you get for a
radioactive material when you are 3 feet from the source (assume an initial
reading of 6300 R at a distance of 1 foot from the source)? b. Dr. Brown has a
radioisotope source containing 1.2 x 106 (also written as 1.2E+06) atoms of
Plutonium-238 in 1985, how many atoms will remain in 352 years? c. How many
protons and neutrons are present in the plutonium-238 nucleus? Consider a van
parked in a lot outside a professional football stadium in Atlanta, GA on a
Sunday afternoon. One ounce of radioactive isotope Cesium 137 was mixed in with
the explosive that has been detonated and has caused considerable blast damage.
The dust cloud carries toward the nearby downtown area on a light wind speed of
10 mph. (Hint: Aristatek.com website for helpful in answering this question).
a. How could the bomb have been detonated? b. A professional emergency
responder should be concerned about the following routes of radiation exposure
for a person on scene and a person downtown? c. What actions should an exposed
person take during the immediate aftermath of the explosion? d. Lastly, if
radioactive material is involved in a disaster incident such as this and there
is a fire ongoing in the area where the container is located (possibly the
container itself), name five actions that should be taken to handle the
situation.
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